Why do people think Poythress came from the French Poitevin, and is there proof?

Research question: Why do some people think the Poythress name came from the French Poitevin, and is there any old record that backs that idea?

The verified facts describe the Poythres name as an English variant of Poytress, originating as a nickname for someone who is scantily clad ¹. They trace it to the Anglo-Norman French phrase 'poi dras', meaning 'little clothing' or wearing none at all ². Neither fact mentions Poitevin or explains why some people link the name to it, so the facts only partly address the question ¹². No old record is cited in the facts, so they neither back nor rule out the Poitevin idea ¹². The facts carry no dates, so their recency cannot be stated ¹².

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